May 1, 2012: Carnation Plaza Gardens in Disneyland closes. The venue, which had opened in 1956, was used for community performances and swing dancing events. Construction begins on the Fantasy Faire, a princess greeting area that opened in March.

May 4, 1977: After a two-year hiatus, a second-generation Main Street Electrical Parade returns to Disneyland with more lights on 3D floats, which average 17 feet high. "Pete's Dragon," Elliott, is added as a gigantic rolling performer in nighttime parades.

May 4, 1977: Tomorrowland is revised, including:

Space Mountain. Technological improvements are made over the Walt Disney World "mountain," which inspired the attraction. It gives the feeling of supersonic speed as the shuttle races through the darkness of outer space. The ride's official opening is later on May 27.

PeopleMover SuperSpeed Tunnel is added as a new surprise during an overhead scenic tour of Tomorrowland powered by linear motors.

May 4, 1977: Bernard, Bianca, Orville and Evinrude from Disney's "The Rescuers" movie are introduced as part of Disneyland's cast of characters.

May 4, 1977: The Mine Train through Nature's Wonderland closes after 21 years and hosting 30 million guests. It was closed to make way for Big Thunder Mountain Railroad.

May 4, 2004: The Twilight Zone Tower of Terror opens in Disney California Adventure. The "Hollywood Terror Hotel" opens in the Hollywood Pictures Backlot, inspired by the TV show, "The Twilight Zone." At the time, the attraction was the biggest addition to California Adventure since its opening in 2001.